In this work, the interconnected graphene scaffolds are prepared by three-dimensional (3D) printing for multifunctional gas detection with tunable sensitivity. The scaffolds with regularly aligned graphene conductive networks exhibit significant mechanical strength and high electrical stability to multi-direction deformation, which can be attributed to the typical core-shell structure of graphene and PVP. The resistance of the free-standing scaffolds can realize the real-time response to H₂O and NO₂, and the relative resistance change to 100 ppm H₂O and 100 ppm NO₂ can reach 2% and 2.5 %, respectively. The charge doping of the oxidizing gases is considered to be the main reason for various response sensitivities of the scaffolds with different orthogonal layers, in which the interconnected conductive network can generate a large specific surface area and significantly improving the adsorption of the target gases and the transfer of charge. The controllable fabrication of regular structure has appropriately great potential for further optimizations and applications in gas detection.

在这项工作中，互连的石墨烯支架是通过三维（3D）打印制备的，用于具有可调灵敏度的多功能气体检测。具有规则排列的石墨烯导电网络的支架表现出显着的机械强度和对多向变形的高电稳定性，这可以归因于石墨烯和PVP的典型核壳结构。独立式脚手架的电阻可以实现对H ₂ O和NO ₂的实时响应，相对电阻变为100 ppm H ₂ O和100 ppm NO ₂分别达到2％和2.5％。氧化气体的电荷掺杂被认为是具有不同正交层的支架具有各种响应敏感性的主要原因，其中互连的导电网络可以产生较大的比表面积并显着提高目标气体和目标气体的吸附。转移费用。规则结构的可控制制造具有适当的巨大潜力，可以进一步优化和应用于气体检测。